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3699d92a KP |
1 | /* |
2 | * Copyright (c) 2010 Cisco Systems, Inc. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | /* XXX TBD some includes may be extraneous */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/moduleparam.h> | |
3699d92a KP |
22 | #include <generated/utsrelease.h> |
23 | #include <linux/utsname.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/kthread.h> | |
27 | #include <linux/types.h> | |
28 | #include <linux/string.h> | |
29 | #include <linux/configfs.h> | |
30 | #include <linux/ctype.h> | |
31 | #include <linux/hash.h> | |
32 | #include <asm/unaligned.h> | |
33 | #include <scsi/scsi.h> | |
34 | #include <scsi/scsi_host.h> | |
35 | #include <scsi/scsi_device.h> | |
36 | #include <scsi/scsi_cmnd.h> | |
61db1802 | 37 | #include <scsi/scsi_tcq.h> |
3699d92a KP |
38 | #include <scsi/libfc.h> |
39 | #include <scsi/fc_encode.h> | |
40 | ||
41 | #include <target/target_core_base.h> | |
c4795fb2 | 42 | #include <target/target_core_fabric.h> |
3699d92a | 43 | #include <target/target_core_configfs.h> |
3699d92a KP |
44 | #include <target/configfs_macros.h> |
45 | ||
46 | #include "tcm_fc.h" | |
47 | ||
48 | /* | |
49 | * Dump cmd state for debugging. | |
50 | */ | |
51 | void ft_dump_cmd(struct ft_cmd *cmd, const char *caller) | |
52 | { | |
53 | struct fc_exch *ep; | |
54 | struct fc_seq *sp; | |
55 | struct se_cmd *se_cmd; | |
ec98f782 AG |
56 | struct scatterlist *sg; |
57 | int count; | |
3699d92a | 58 | |
3699d92a | 59 | se_cmd = &cmd->se_cmd; |
58fc73d1 CH |
60 | pr_debug("%s: cmd %p sess %p seq %p se_cmd %p\n", |
61 | caller, cmd, cmd->sess, cmd->seq, se_cmd); | |
3699d92a | 62 | |
6708bb27 | 63 | pr_debug("%s: cmd %p data_nents %u len %u se_cmd_flags <0x%x>\n", |
ec98f782 | 64 | caller, cmd, se_cmd->t_data_nents, |
05d1c7c0 | 65 | se_cmd->data_length, se_cmd->se_cmd_flags); |
5951146d | 66 | |
ec98f782 | 67 | for_each_sg(se_cmd->t_data_sg, sg, se_cmd->t_data_nents, count) |
6708bb27 | 68 | pr_debug("%s: cmd %p sg %p page %p " |
ec98f782 AG |
69 | "len 0x%x off 0x%x\n", |
70 | caller, cmd, sg, | |
71 | sg_page(sg), sg->length, sg->offset); | |
72 | ||
3699d92a KP |
73 | sp = cmd->seq; |
74 | if (sp) { | |
75 | ep = fc_seq_exch(sp); | |
6708bb27 | 76 | pr_debug("%s: cmd %p sid %x did %x " |
3699d92a KP |
77 | "ox_id %x rx_id %x seq_id %x e_stat %x\n", |
78 | caller, cmd, ep->sid, ep->did, ep->oxid, ep->rxid, | |
79 | sp->id, ep->esb_stat); | |
80 | } | |
3699d92a KP |
81 | } |
82 | ||
3699d92a KP |
83 | static void ft_free_cmd(struct ft_cmd *cmd) |
84 | { | |
85 | struct fc_frame *fp; | |
86 | struct fc_lport *lport; | |
87 | ||
88 | if (!cmd) | |
89 | return; | |
90 | fp = cmd->req_frame; | |
91 | lport = fr_dev(fp); | |
92 | if (fr_seq(fp)) | |
93 | lport->tt.seq_release(fr_seq(fp)); | |
94 | fc_frame_free(fp); | |
95 | ft_sess_put(cmd->sess); /* undo get from lookup at recv */ | |
96 | kfree(cmd); | |
97 | } | |
98 | ||
99 | void ft_release_cmd(struct se_cmd *se_cmd) | |
100 | { | |
101 | struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd); | |
102 | ||
103 | ft_free_cmd(cmd); | |
104 | } | |
105 | ||
88dd9e26 | 106 | int ft_check_stop_free(struct se_cmd *se_cmd) |
3699d92a | 107 | { |
82f1c8a4 | 108 | transport_generic_free_cmd(se_cmd, 0); |
88dd9e26 | 109 | return 1; |
3699d92a KP |
110 | } |
111 | ||
112 | /* | |
113 | * Send response. | |
114 | */ | |
115 | int ft_queue_status(struct se_cmd *se_cmd) | |
116 | { | |
117 | struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd); | |
118 | struct fc_frame *fp; | |
119 | struct fcp_resp_with_ext *fcp; | |
120 | struct fc_lport *lport; | |
121 | struct fc_exch *ep; | |
122 | size_t len; | |
123 | ||
e1c40382 MR |
124 | if (cmd->aborted) |
125 | return 0; | |
3699d92a KP |
126 | ft_dump_cmd(cmd, __func__); |
127 | ep = fc_seq_exch(cmd->seq); | |
128 | lport = ep->lp; | |
129 | len = sizeof(*fcp) + se_cmd->scsi_sense_length; | |
130 | fp = fc_frame_alloc(lport, len); | |
131 | if (!fp) { | |
132 | /* XXX shouldn't just drop it - requeue and retry? */ | |
133 | return 0; | |
134 | } | |
135 | fcp = fc_frame_payload_get(fp, len); | |
136 | memset(fcp, 0, len); | |
137 | fcp->resp.fr_status = se_cmd->scsi_status; | |
138 | ||
139 | len = se_cmd->scsi_sense_length; | |
140 | if (len) { | |
141 | fcp->resp.fr_flags |= FCP_SNS_LEN_VAL; | |
142 | fcp->ext.fr_sns_len = htonl(len); | |
143 | memcpy((fcp + 1), se_cmd->sense_buffer, len); | |
144 | } | |
145 | ||
146 | /* | |
147 | * Test underflow and overflow with one mask. Usually both are off. | |
148 | * Bidirectional commands are not handled yet. | |
149 | */ | |
150 | if (se_cmd->se_cmd_flags & (SCF_OVERFLOW_BIT | SCF_UNDERFLOW_BIT)) { | |
151 | if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) | |
152 | fcp->resp.fr_flags |= FCP_RESID_OVER; | |
153 | else | |
154 | fcp->resp.fr_flags |= FCP_RESID_UNDER; | |
155 | fcp->ext.fr_resid = cpu_to_be32(se_cmd->residual_count); | |
156 | } | |
157 | ||
158 | /* | |
159 | * Send response. | |
160 | */ | |
161 | cmd->seq = lport->tt.seq_start_next(cmd->seq); | |
162 | fc_fill_fc_hdr(fp, FC_RCTL_DD_CMD_STATUS, ep->did, ep->sid, FC_TYPE_FCP, | |
163 | FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ, 0); | |
164 | ||
165 | lport->tt.seq_send(lport, cmd->seq, fp); | |
166 | lport->tt.exch_done(cmd->seq); | |
167 | return 0; | |
168 | } | |
169 | ||
170 | int ft_write_pending_status(struct se_cmd *se_cmd) | |
171 | { | |
172 | struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd); | |
173 | ||
174 | return cmd->write_data_len != se_cmd->data_length; | |
175 | } | |
176 | ||
177 | /* | |
178 | * Send TX_RDY (transfer ready). | |
179 | */ | |
180 | int ft_write_pending(struct se_cmd *se_cmd) | |
181 | { | |
182 | struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd); | |
183 | struct fc_frame *fp; | |
184 | struct fcp_txrdy *txrdy; | |
185 | struct fc_lport *lport; | |
186 | struct fc_exch *ep; | |
187 | struct fc_frame_header *fh; | |
188 | u32 f_ctl; | |
189 | ||
190 | ft_dump_cmd(cmd, __func__); | |
191 | ||
e1c40382 MR |
192 | if (cmd->aborted) |
193 | return 0; | |
3699d92a KP |
194 | ep = fc_seq_exch(cmd->seq); |
195 | lport = ep->lp; | |
196 | fp = fc_frame_alloc(lport, sizeof(*txrdy)); | |
197 | if (!fp) | |
03e98c9e | 198 | return -ENOMEM; /* Signal QUEUE_FULL */ |
3699d92a KP |
199 | |
200 | txrdy = fc_frame_payload_get(fp, sizeof(*txrdy)); | |
201 | memset(txrdy, 0, sizeof(*txrdy)); | |
202 | txrdy->ft_burst_len = htonl(se_cmd->data_length); | |
203 | ||
204 | cmd->seq = lport->tt.seq_start_next(cmd->seq); | |
205 | fc_fill_fc_hdr(fp, FC_RCTL_DD_DATA_DESC, ep->did, ep->sid, FC_TYPE_FCP, | |
206 | FC_FC_EX_CTX | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0); | |
207 | ||
208 | fh = fc_frame_header_get(fp); | |
209 | f_ctl = ntoh24(fh->fh_f_ctl); | |
210 | ||
211 | /* Only if it is 'Exchange Responder' */ | |
212 | if (f_ctl & FC_FC_EX_CTX) { | |
213 | /* Target is 'exchange responder' and sending XFER_READY | |
214 | * to 'exchange initiator (initiator)' | |
215 | */ | |
216 | if ((ep->xid <= lport->lro_xid) && | |
217 | (fh->fh_r_ctl == FC_RCTL_DD_DATA_DESC)) { | |
e182d682 RD |
218 | if ((se_cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) && |
219 | lport->tt.ddp_target(lport, ep->xid, | |
220 | se_cmd->t_data_sg, | |
221 | se_cmd->t_data_nents)) | |
3699d92a KP |
222 | cmd->was_ddp_setup = 1; |
223 | } | |
224 | } | |
225 | lport->tt.seq_send(lport, cmd->seq, fp); | |
226 | return 0; | |
227 | } | |
228 | ||
229 | u32 ft_get_task_tag(struct se_cmd *se_cmd) | |
230 | { | |
231 | struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd); | |
232 | ||
233 | return fc_seq_exch(cmd->seq)->rxid; | |
234 | } | |
235 | ||
236 | int ft_get_cmd_state(struct se_cmd *se_cmd) | |
237 | { | |
58fc73d1 | 238 | return 0; |
3699d92a KP |
239 | } |
240 | ||
3699d92a KP |
241 | /* |
242 | * FC sequence response handler for follow-on sequences (data) and aborts. | |
243 | */ | |
244 | static void ft_recv_seq(struct fc_seq *sp, struct fc_frame *fp, void *arg) | |
245 | { | |
246 | struct ft_cmd *cmd = arg; | |
247 | struct fc_frame_header *fh; | |
248 | ||
e1c40382 | 249 | if (unlikely(IS_ERR(fp))) { |
3699d92a | 250 | /* XXX need to find cmd if queued */ |
3699d92a | 251 | cmd->seq = NULL; |
e1c40382 | 252 | cmd->aborted = true; |
3699d92a KP |
253 | return; |
254 | } | |
255 | ||
256 | fh = fc_frame_header_get(fp); | |
257 | ||
258 | switch (fh->fh_r_ctl) { | |
259 | case FC_RCTL_DD_SOL_DATA: /* write data */ | |
260 | ft_recv_write_data(cmd, fp); | |
261 | break; | |
262 | case FC_RCTL_DD_UNSOL_CTL: /* command */ | |
263 | case FC_RCTL_DD_SOL_CTL: /* transfer ready */ | |
264 | case FC_RCTL_DD_DATA_DESC: /* transfer ready */ | |
265 | default: | |
6708bb27 | 266 | pr_debug("%s: unhandled frame r_ctl %x\n", |
3699d92a | 267 | __func__, fh->fh_r_ctl); |
dcd998cc | 268 | ft_invl_hw_context(cmd); |
3699d92a | 269 | fc_frame_free(fp); |
82f1c8a4 | 270 | transport_generic_free_cmd(&cmd->se_cmd, 0); |
3699d92a KP |
271 | break; |
272 | } | |
273 | } | |
274 | ||
275 | /* | |
276 | * Send a FCP response including SCSI status and optional FCP rsp_code. | |
277 | * status is SAM_STAT_GOOD (zero) iff code is valid. | |
278 | * This is used in error cases, such as allocation failures. | |
279 | */ | |
280 | static void ft_send_resp_status(struct fc_lport *lport, | |
281 | const struct fc_frame *rx_fp, | |
282 | u32 status, enum fcp_resp_rsp_codes code) | |
283 | { | |
284 | struct fc_frame *fp; | |
285 | struct fc_seq *sp; | |
286 | const struct fc_frame_header *fh; | |
287 | size_t len; | |
288 | struct fcp_resp_with_ext *fcp; | |
289 | struct fcp_resp_rsp_info *info; | |
290 | ||
291 | fh = fc_frame_header_get(rx_fp); | |
6708bb27 | 292 | pr_debug("FCP error response: did %x oxid %x status %x code %x\n", |
3699d92a KP |
293 | ntoh24(fh->fh_s_id), ntohs(fh->fh_ox_id), status, code); |
294 | len = sizeof(*fcp); | |
295 | if (status == SAM_STAT_GOOD) | |
296 | len += sizeof(*info); | |
297 | fp = fc_frame_alloc(lport, len); | |
298 | if (!fp) | |
299 | return; | |
300 | fcp = fc_frame_payload_get(fp, len); | |
301 | memset(fcp, 0, len); | |
302 | fcp->resp.fr_status = status; | |
303 | if (status == SAM_STAT_GOOD) { | |
304 | fcp->ext.fr_rsp_len = htonl(sizeof(*info)); | |
305 | fcp->resp.fr_flags |= FCP_RSP_LEN_VAL; | |
306 | info = (struct fcp_resp_rsp_info *)(fcp + 1); | |
307 | info->rsp_code = code; | |
308 | } | |
309 | ||
310 | fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_DD_CMD_STATUS, 0); | |
311 | sp = fr_seq(fp); | |
031ed4d5 | 312 | if (sp) { |
3699d92a | 313 | lport->tt.seq_send(lport, sp, fp); |
031ed4d5 NB |
314 | lport->tt.exch_done(sp); |
315 | } else { | |
3699d92a | 316 | lport->tt.frame_send(lport, fp); |
031ed4d5 | 317 | } |
3699d92a KP |
318 | } |
319 | ||
320 | /* | |
321 | * Send error or task management response. | |
3699d92a | 322 | */ |
f2f7b09c KP |
323 | static void ft_send_resp_code(struct ft_cmd *cmd, |
324 | enum fcp_resp_rsp_codes code) | |
3699d92a KP |
325 | { |
326 | ft_send_resp_status(cmd->sess->tport->lport, | |
327 | cmd->req_frame, SAM_STAT_GOOD, code); | |
f2f7b09c KP |
328 | } |
329 | ||
330 | ||
331 | /* | |
332 | * Send error or task management response. | |
333 | * Always frees the cmd and associated state. | |
334 | */ | |
335 | static void ft_send_resp_code_and_free(struct ft_cmd *cmd, | |
336 | enum fcp_resp_rsp_codes code) | |
337 | { | |
338 | ft_send_resp_code(cmd, code); | |
3699d92a KP |
339 | ft_free_cmd(cmd); |
340 | } | |
341 | ||
342 | /* | |
343 | * Handle Task Management Request. | |
344 | */ | |
345 | static void ft_send_tm(struct ft_cmd *cmd) | |
346 | { | |
3699d92a | 347 | struct fcp_cmnd *fcp; |
00ad4c4e | 348 | int rc; |
3699d92a KP |
349 | u8 tm_func; |
350 | ||
351 | fcp = fc_frame_payload_get(cmd->req_frame, sizeof(*fcp)); | |
352 | ||
353 | switch (fcp->fc_tm_flags) { | |
354 | case FCP_TMF_LUN_RESET: | |
355 | tm_func = TMR_LUN_RESET; | |
3699d92a KP |
356 | break; |
357 | case FCP_TMF_TGT_RESET: | |
358 | tm_func = TMR_TARGET_WARM_RESET; | |
359 | break; | |
360 | case FCP_TMF_CLR_TASK_SET: | |
361 | tm_func = TMR_CLEAR_TASK_SET; | |
362 | break; | |
363 | case FCP_TMF_ABT_TASK_SET: | |
364 | tm_func = TMR_ABORT_TASK_SET; | |
365 | break; | |
366 | case FCP_TMF_CLR_ACA: | |
367 | tm_func = TMR_CLEAR_ACA; | |
368 | break; | |
369 | default: | |
370 | /* | |
371 | * FCP4r01 indicates having a combination of | |
372 | * tm_flags set is invalid. | |
373 | */ | |
6708bb27 | 374 | pr_debug("invalid FCP tm_flags %x\n", fcp->fc_tm_flags); |
f2f7b09c | 375 | ft_send_resp_code_and_free(cmd, FCP_CMND_FIELDS_INVALID); |
3699d92a KP |
376 | return; |
377 | } | |
378 | ||
c0974f89 | 379 | /* FIXME: Add referenced task tag for ABORT_TASK */ |
00ad4c4e | 380 | rc = target_submit_tmr(&cmd->se_cmd, cmd->sess->se_sess, |
59dcb5ec | 381 | &cmd->ft_sense_buffer[0], scsilun_to_int(&fcp->fc_lun), |
c0974f89 | 382 | cmd, tm_func, GFP_KERNEL, 0, 0); |
00ad4c4e NB |
383 | if (rc < 0) |
384 | ft_send_resp_code_and_free(cmd, FCP_TMF_FAILED); | |
3699d92a KP |
385 | } |
386 | ||
387 | /* | |
388 | * Send status from completed task management request. | |
389 | */ | |
390 | int ft_queue_tm_resp(struct se_cmd *se_cmd) | |
391 | { | |
392 | struct ft_cmd *cmd = container_of(se_cmd, struct ft_cmd, se_cmd); | |
393 | struct se_tmr_req *tmr = se_cmd->se_tmr_req; | |
394 | enum fcp_resp_rsp_codes code; | |
395 | ||
e1c40382 MR |
396 | if (cmd->aborted) |
397 | return 0; | |
3699d92a KP |
398 | switch (tmr->response) { |
399 | case TMR_FUNCTION_COMPLETE: | |
400 | code = FCP_TMF_CMPL; | |
401 | break; | |
402 | case TMR_LUN_DOES_NOT_EXIST: | |
403 | code = FCP_TMF_INVALID_LUN; | |
404 | break; | |
405 | case TMR_FUNCTION_REJECTED: | |
406 | code = FCP_TMF_REJECTED; | |
407 | break; | |
408 | case TMR_TASK_DOES_NOT_EXIST: | |
409 | case TMR_TASK_STILL_ALLEGIANT: | |
410 | case TMR_TASK_FAILOVER_NOT_SUPPORTED: | |
411 | case TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED: | |
412 | case TMR_FUNCTION_AUTHORIZATION_FAILED: | |
413 | default: | |
414 | code = FCP_TMF_FAILED; | |
415 | break; | |
416 | } | |
6708bb27 | 417 | pr_debug("tmr fn %d resp %d fcp code %d\n", |
3699d92a KP |
418 | tmr->function, tmr->response, code); |
419 | ft_send_resp_code(cmd, code); | |
420 | return 0; | |
421 | } | |
422 | ||
58fc73d1 CH |
423 | static void ft_send_work(struct work_struct *work); |
424 | ||
3699d92a KP |
425 | /* |
426 | * Handle incoming FCP command. | |
427 | */ | |
428 | static void ft_recv_cmd(struct ft_sess *sess, struct fc_frame *fp) | |
429 | { | |
430 | struct ft_cmd *cmd; | |
431 | struct fc_lport *lport = sess->tport->lport; | |
432 | ||
433 | cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); | |
434 | if (!cmd) | |
435 | goto busy; | |
436 | cmd->sess = sess; | |
437 | cmd->seq = lport->tt.seq_assign(lport, fp); | |
438 | if (!cmd->seq) { | |
439 | kfree(cmd); | |
440 | goto busy; | |
441 | } | |
442 | cmd->req_frame = fp; /* hold frame during cmd */ | |
58fc73d1 CH |
443 | |
444 | INIT_WORK(&cmd->work, ft_send_work); | |
445 | queue_work(sess->tport->tpg->workqueue, &cmd->work); | |
3699d92a KP |
446 | return; |
447 | ||
448 | busy: | |
6708bb27 | 449 | pr_debug("cmd or seq allocation failure - sending BUSY\n"); |
3699d92a KP |
450 | ft_send_resp_status(lport, fp, SAM_STAT_BUSY, 0); |
451 | fc_frame_free(fp); | |
452 | ft_sess_put(sess); /* undo get from lookup */ | |
453 | } | |
454 | ||
455 | ||
456 | /* | |
457 | * Handle incoming FCP frame. | |
458 | * Caller has verified that the frame is type FCP. | |
459 | */ | |
460 | void ft_recv_req(struct ft_sess *sess, struct fc_frame *fp) | |
461 | { | |
462 | struct fc_frame_header *fh = fc_frame_header_get(fp); | |
463 | ||
464 | switch (fh->fh_r_ctl) { | |
465 | case FC_RCTL_DD_UNSOL_CMD: /* command */ | |
466 | ft_recv_cmd(sess, fp); | |
467 | break; | |
468 | case FC_RCTL_DD_SOL_DATA: /* write data */ | |
469 | case FC_RCTL_DD_UNSOL_CTL: | |
470 | case FC_RCTL_DD_SOL_CTL: | |
471 | case FC_RCTL_DD_DATA_DESC: /* transfer ready */ | |
472 | case FC_RCTL_ELS4_REQ: /* SRR, perhaps */ | |
473 | default: | |
6708bb27 | 474 | pr_debug("%s: unhandled frame r_ctl %x\n", |
3699d92a KP |
475 | __func__, fh->fh_r_ctl); |
476 | fc_frame_free(fp); | |
477 | ft_sess_put(sess); /* undo get from lookup */ | |
478 | break; | |
479 | } | |
480 | } | |
481 | ||
482 | /* | |
483 | * Send new command to target. | |
484 | */ | |
58fc73d1 | 485 | static void ft_send_work(struct work_struct *work) |
3699d92a | 486 | { |
58fc73d1 | 487 | struct ft_cmd *cmd = container_of(work, struct ft_cmd, work); |
3699d92a | 488 | struct fc_frame_header *fh = fc_frame_header_get(cmd->req_frame); |
3699d92a | 489 | struct fcp_cmnd *fcp; |
58fc73d1 | 490 | int data_dir = 0; |
3699d92a | 491 | int task_attr; |
3699d92a KP |
492 | |
493 | fcp = fc_frame_payload_get(cmd->req_frame, sizeof(*fcp)); | |
494 | if (!fcp) | |
495 | goto err; | |
496 | ||
497 | if (fcp->fc_flags & FCP_CFL_LEN_MASK) | |
498 | goto err; /* not handling longer CDBs yet */ | |
499 | ||
3699d92a KP |
500 | /* |
501 | * Check for FCP task management flags | |
502 | */ | |
503 | if (fcp->fc_tm_flags) { | |
504 | ft_send_tm(cmd); | |
505 | return; | |
506 | } | |
0dccb69d AG |
507 | |
508 | switch (fcp->fc_flags & (FCP_CFL_RDDATA | FCP_CFL_WRDATA)) { | |
509 | case 0: | |
510 | data_dir = DMA_NONE; | |
511 | break; | |
512 | case FCP_CFL_RDDATA: | |
513 | data_dir = DMA_FROM_DEVICE; | |
514 | break; | |
515 | case FCP_CFL_WRDATA: | |
516 | data_dir = DMA_TO_DEVICE; | |
517 | break; | |
518 | case FCP_CFL_WRDATA | FCP_CFL_RDDATA: | |
519 | goto err; /* TBD not supported by tcm_fc yet */ | |
520 | } | |
521 | /* | |
522 | * Locate the SAM Task Attr from fc_pri_ta | |
523 | */ | |
524 | switch (fcp->fc_pri_ta & FCP_PTA_MASK) { | |
525 | case FCP_PTA_HEADQ: | |
526 | task_attr = MSG_HEAD_TAG; | |
527 | break; | |
528 | case FCP_PTA_ORDERED: | |
529 | task_attr = MSG_ORDERED_TAG; | |
530 | break; | |
531 | case FCP_PTA_ACA: | |
532 | task_attr = MSG_ACA_TAG; | |
533 | break; | |
534 | case FCP_PTA_SIMPLE: /* Fallthrough */ | |
535 | default: | |
536 | task_attr = MSG_SIMPLE_TAG; | |
537 | } | |
538 | ||
3699d92a | 539 | fc_seq_exch(cmd->seq)->lp->tt.seq_set_resp(cmd->seq, ft_recv_seq, cmd); |
4355a911 NB |
540 | /* |
541 | * Use a single se_cmd->cmd_kref as we expect to release se_cmd | |
542 | * directly from ft_check_stop_free callback in response path. | |
543 | */ | |
35b2cdc4 | 544 | target_submit_cmd(&cmd->se_cmd, cmd->sess->se_sess, fcp->fc_cdb, |
e35fa8c2 | 545 | &cmd->ft_sense_buffer[0], scsilun_to_int(&fcp->fc_lun), |
0dccb69d | 546 | ntohl(fcp->fc_dl), task_attr, data_dir, 0); |
1edcdb49 | 547 | pr_debug("r_ctl %x alloc target_submit_cmd\n", fh->fh_r_ctl); |
3699d92a KP |
548 | return; |
549 | ||
550 | err: | |
f2f7b09c | 551 | ft_send_resp_code_and_free(cmd, FCP_CMND_FIELDS_INVALID); |
3699d92a | 552 | } |